If you've used the event checklist to host an event in Gather and have made a reservation for the event on the Space dashboard, but then need to change the Space, you must cancel your reservation. From the checklist, select Go to dashboard, then cancel the reservation for the event.
Once you've canceled the reservation, you can go back to Step 3: Space Creation, and select Change space. A warning displays: "Do you wish to proceed? This Space and its settings will no longer be tied to this event. You can find your old space under the My Spaces tab in your homepage." Select Yes, disconnect.
You then get to select the updated Space. You can create a new Space by choosing Select a template, use an existing Space by choosing Link to an existing Space, or pick a partner to design your event Space by choosing Work with a partner.